Improved apparatus for roasting and reducing ores



G. W. WHITE, APPARATUS FOR ROASTING AND REDUCING ORE'AS. Patented Sept.6, 1864.

UNITED STATES GEORGE w. WHITE, on NEW YORK,

PATENT OFFICE.

.N. Y., ASSIGNOR TO HIMSELF AND AUSTIN G.. DAY, OF SEYMOUR, CONNECTICUT.

IMPROVED APPARATUS FOR ROASTENG AND REDUCING ORES Specification formingpar of Letters Patent No. 44,145, dated September 6, 1864 antedatcdAugust 23, 1864.

To all whom it'may concern:

Be it known that I, GEO. W. WHITE, of the State, city, and county of NewYork, have invented an Improved Machine for Calcining, Reducing, andSeparating Ores; and I do he; eby declare that the following is a full,clear, and exact description of the same, reference being had to theaccompanying drawings, which form part of this specification, in which-'Figure 1 is a side elevation of the machine and part in section. Fig. 2shows a transverse section of the cylinder.

The principal mechanical elements of my machine are a furnace, and ahorizontally-rotating cylinder open at both ends to the atmosphere, andinclined so as to convey the ore from the receiving end of the cylinderat the furnace to the opposite or'discharging end,- and the object ofthe machine is to oxidize and desulphurize oxidizable ores, and toreduce and sep-' arate such as are non-oxidable. My said invention istherefore distinguished both from those which have a rotating cylinderclosed to the atmosphere and conduct the ore to the furnace for thepurpose of deoxidation, as in the treatment of iron ores, and from suchas are designed for oxidation and desulphurization and have no revolvingcylinder.

The nature of my invention therefore consists, first, in the employmentof an inclined revolving cylinder, in combination with a furnace and afeeding device at one end of said cylinder, and an elbow or bonnet atthe opposite end to conduct and direct the calcined ore. into a suitabletank or other receptacle; secondly, in constructing the cylinder withlongiv tudinal grooves in its inner periphery, substantially ashereinafter set forth thirdly, in the use, in combination with thefurnace and revolving cylinder, of a vibrating shoe or hopper to passthe ore into the end of the cylinder; fourthly, in vibrating such shoeby means of suitable projections on the revolving'cylinder actingluponsuch shoe.

To enable others to make and use my invention, I will proceed todescribe the sam'e.

In the drawings annexed, A represents a suitable furnace.

B is a shoe or feeder. It is situated in the upper part of the furnace,and is hinged at 1 to admit of being oscillated or vibrated. It is alsoincased partially by the surface to prevent the escape of the heat. Thiscasing may be formed in the shape of an arc at the end of the feeder, soas to conform to the motions thereof.

O is the cylinder, which may be either straight or conical. It is formedof heavy iron and lined with fire-brick or any suitable material adaptedto resist intense heat. The interior surface of the cylinder is groovedlengthwise. This may be done bylong and short bricks alternated inlongitudinal rows, as seen in the sectional view, Fig.2. The exteriorsurface may be jacketed to preventthe radiation of heat.

In order to obviate the use of a shaft and journals,which would obstructthe openings at the ends of the cylinder, and would be shortlydestroyedby theheat, I supportthe cylinder by anti-friction wheels 2 2,which also form the bearings for the rotation of such cylinder. By thusthrowingthe' bearings on the outer periphery of the cylinder, the endsthereof are entirely free and open for the ingress and egress of theore.

At such end of the cylinder I provide an encircling'collar, 4, in whichthe cylinder is free to rotate. Said collars fit as snugly as possiblewithout actual contact. The cylinder is inclined downward from thefurnace, and the lower end of the cylinder is inclosed in an elbow orbonnet, D, and its object is to direct the Contents of the cylinder intoa suitable tank or other receptacle. At theupper end of the cylinder areprojections 3 3, which, in the rotation thereof, comeinto contact withthe shoeB and move it intermittently to feed in the ore. The location orform of said projections is not material to the invention.

Power is applied to the machine by means of a wire band passing aroundthe cylinder in the groove V thereon. As the cylinder revolves, the shoeor feeder B is shaken and the ore is fed slowly into the cylinder, andin the rotation thereofthe ore, &c., gradually gravitate toward thelower end and escape calcined and reduced under the bonnet D at thelower end.

I claim as my invention and desire to secure by Letters Patent 1. Theuse of an inclined rotating cylinder,

1n combination with a furnace at the receiving 4. Operating such feederby ineans of the reend of said cylinder, and a bonnet at the disvolvingcylinder through the agency of procharging end thereof to conduct. ordirect the jeetions thereon, as specified, or any equivw calcined oreinto a tank or other receptacle. lent therefor, substantially asdescribed.

2. Grooving theinner surface of the cylinder longitudinally, for thepurpose and substan- GEORGE W. WHITE. tially as specified;

- 3. The employment, in combination with the Witnesses:

furnace and rotating cylinder, of a vibrating CHARLES C. LEEDS,

shoe or feeder, for the purpose described. THOS. A. LEDWITH

